Alloy composition, semi-autogenous mill lining plate and manufacturing method of lining plate

A semi-autogenous mill and manufacturing method technology, applied in the direction of manufacturing tools, grain processing, furnace types, etc., can solve the problems affecting the civilized production of modern enterprises, waste of manpower, material resources, financial resources, maintenance and replacement, etc. The effect of avoiding duplication of labor, reducing labor intensity, and reducing the number of maintenance

Inactive Publication Date: 2014-10-08
TAIYUAN HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long-term harsh working conditions of the cylinder liner, the amount of maintenance and replacement is quite large, which not only wastes manpower, material resources, and financial resources, but also directly affects production efficiency and affects the civilized production of modern enterprises.

Method used

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  • Alloy composition, semi-autogenous mill lining plate and manufacturing method of lining plate
  • Alloy composition, semi-autogenous mill lining plate and manufacturing method of lining plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Select each component according to the required content of the semi-autogenous mill liner, by weight percentage, C: 0.4%, Si: 0.5%, Mn: 0.75%, P: ≤0.025%, S: ≤0.025%, Cr: 1.8 %, Mo: 0.25%, Ni: 0.2%, Ti: 0.015%, Cu: 0.2%, B: 0.002%, La: 0.03%, Al: ≤0.03%, the balance is Fe, and then cast the liner;

[0056] Annealing treatment: heat the cast liner to 550°C and hold it for 7 hours, then heat it to 850°C and hold it for 10 hours, then cool it to 600°C in about 3 hours and hold it for 12 hours, and finally cool it to 400°C with the furnace then air-cooled to room temperature;

[0057] Quenching treatment: heat the annealed liner to 700°C and hold it for 3 hours, then heat it to 900°C and hold it for 3 hours, then cool it in oil to below 60°C;

[0058] Tempering treatment: heat the quenched liner to 550°C and keep it warm for 12 hours, then cool it in the air to obtain the heat-treated semi-autogenous mill liner;

[0059] Finally, finishing and grinding, flaw detection and...

Embodiment 2

[0061] Select each component according to the required content of the semi-autogenous mill liner, by weight percentage, C: 0.35%, Si: 0.55%, Mn: 0.8%, P: ≤0.025%, S: ≤0.025%, Cr: 1.6 %, Mo: 0.27%, Ni: 0.25%, Ti: 0.02%, Cu: 0.2%, B: 0.002%, La: 0.04%, Al: ≤0.03%, the balance is Fe, and then cast the liner;

[0062] Annealing treatment: heat the cast liner to 600°C and hold it for 6 hours, then heat it to 950°C and hold it for 9 hours, then cool it to 700°C in about 3 hours and hold it for 10 hours, and finally cool it to 400°C with the furnace then air-cooled to room temperature;

[0063] Quenching treatment: heat the annealed liner to 800°C and hold it for 2.5 hours, then heat it to 950°C and hold it for 2.5 hours, then cool it in oil to below 60°C;

[0064] Tempering treatment: heat the quenched liner to 520°C and keep it warm for 10 hours, then cool it in the air to obtain the heat-treated semi-autogenous mill liner;

[0065] Finally, finishing and grinding, flaw detection...

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PUM

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Abstract

The invention provides an alloy composition, comprising the following components in percentage by weight: 0.3-0.5% of C, 0.5-0.8% of Si, 0.7-1.3% of Mn, less than or equal to 0.025% of P, less than or equal to 0.025% of S, 1.5-3% of Cr, 0.2-0.4% of Mo, 0.15-0.35% of Ni, 0.005-0.020% of Ti, 0.1-0.35% of Cu, 0.001-0.006% of B, 0.02-0.07% of La, less than or equal to 0.03% of Al and the balance of Fe. The invention further provides a semi-autogenous mill lining plate made of the alloy composition and a manufacturing method of the lining plate. The semi-autogenous mill lining plate disclosed by the invention has excellent mechanical property and good abrasion resistance, so that the overhauling frequency is reduced, repeated work is avoided, the labor intensity is reduced, the service life of equipment is prolonged, and the economic benefit is improved.

Description

technical field [0001] The invention relates to a semi-autogenous mill, in particular to a liner for a semi-autogenous mill and a manufacturing method thereof. Background technique [0002] The semi-autogenous mill is the main crushing and grinding equipment in the production of thermal power, mining, chemical industry, metallurgy and other industries at home and abroad, and the cylinder liner and grinding ball are the main working parts in the normal operation of the semi-autogenous mill. Its working principle: The ore rotates with the cylinder, the position is raised rapidly, and it quickly changes from the state of compression to the state of tension. When the gravity of the ore overcomes the centrifugal force, the ore will fall away from the cylinder, but the falling paths of ores of various particle sizes are different. Due to the strong gravity, the upper body first slides down when the upper body reaches a lower height, and at the same time produces impact and grindi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/54C21D9/00C21D6/00B02C17/22
Inventor 边功勋段宝山
Owner TAIYUAN HEAVY IND
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